package de.intevation.flys.utils;

import de.intevation.artifacts.common.utils.FileTools;
import de.intevation.flys.artifacts.states.FloodMapState;

import java.io.File;
import java.io.IOException;

/**
 * Various utility methods for handling of files and directories.
 * @author <a href="mailto:christian.lins@intevation.de">Christian Lins</a>
 */
public class FileUtils {

    public static boolean extractZipfile(File archive, File dir) {
        try {
            File tmpDir = new File(dir, "usr_tmp");
            FileTools.extractArchive(archive, tmpDir);
            FileUtils.moveFiles(tmpDir, dir);

            return true;
        }
        catch (IOException ioe) {
            FloodMapState.logger.warn("Zip archive " + dir + "/" + FloodMapState.WSPLGEN_USER_ZIP + " could not be extracted.");
            return false;
        }
    }

    public static void moveFiles(File source, final File target)
    throws IOException
    {
        if (!source.exists()) {
            return;
        }
        if (!target.exists()) {
            target.mkdir();
        }
        FileTools.walkTree(source, new FileTools.FileVisitor() {
            @Override
            public boolean visit(File file) {
                if (!file.isDirectory()) {
                    String name = file.getName();
                    String suffix = "";
                    int pos = name.lastIndexOf('.');
                    if (pos > 0 && pos < name.length() - 1) {
                        suffix = name.substring(pos + 1);
                    }
                    else {
                        return true;
                    }
                    try {
                        FileTools.copyFile(file, new File(target, FloodMapState.WSPLGEN_USER_FILENAME + "." + suffix));
                    }
                    catch (IOException ioe) {
                        FloodMapState.logger.warn ("Error while copying file " + file.getName());
                        return true;
                    }
                }
                return true;
            }
        });

        FileTools.deleteRecursive(source);
    }

}